Train-speed control.



J. ROBBE.

TRAIN SPEED CONTROL.

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Patented July 30, 1918.

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APPLICATION FILED 001.13. ran.

Patented July 30, 1918.

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JULIUS ROBBIE, OI MEMPHIS, TEN NESSEE.

TRAIN-SPEED CONTROL.

Specification of Letters Patent.

Patented July 30, 1918 Application filed October 13, 1917. Serial No. 196,532.

To a?! whom it may concern.

Be it known that I, JULIUS ROBBE, a citizen of the United States, residing at Memphis, in the county of Shelby and State of Tennessee, have invented new and useful Improvements in Train-Speed Controls, of which the following is a specification.

This invention relates to apparatus for automatically controlling the speed of trains and the principal object of the invention is to provide means controlled by the speed of the train for first giving warning when the train is exceeding a predetermined speed and then applying the brakes if the speed is increased.

A further object of the invention is to provide means for indicating the speed the train is traveling and other means for registering the speed traveled er hour for the trip.

Another object oi the invention is to provide a device of this character which is simple and durable in construction, reliable and efficient in operation and one which can be manufactured and placed upon the market at a minimum cost.

The invention also consists in certain other features of construction and in the combination and arrangement of the several parts, to be hereinafter fully described, illustrated in the accompanying drawings and specifically pointed out in the appended claims.

In describing my invention in detail, reference will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout theseveral views, and in which Figure 1 is an elevation of the invention with parts broken away and parts shown in section.

Fig. 2 is a section on line 2-2 of Fig. 1..

Figs. 3, 4 and 5 are views of details.

In carrying out my invention I locate a casing 1, preferably in the cab of the engine and this casingicontains the operating parts of my device. The device consists of a centrifugal governor 2 located in the casing and connected with one of the wheels 3 of the tra n by any suitable means, those shown consisting of a shaft 4 resiliently supported on a bracket 5 carried by any suitable part of the train. This shaft carries a pulley 6 which is connected with the car wheel 3 by means of a belt 7. The shaft 4 is provided with a small gear 8 which meshes with the gear 9 carried by ashaft 10 and which is suitably supported in the bracket 11. The

shaft 10 is connected to the governor by flexible shafting 12 which may be of the well known flexible type or which may be provided with universal joints at desired positions. The bracket 11 is slidably connected with the bracket 5 by means of the rods 13 and the coil springs 14. These springs While permitting the proper transmission of the power to the shaft 4 from the car wheel will prevent damage to the parts from jars and the like.

The governor 2 is supported in standards 15 and 16, and the standard 15 supports the upper end of the shafting 12. This part of the shafting carries a toothed wheel 17 which meshes with a like wheel 18 secured to *the stub shaft 19 of the governor. "The governor may be of any desired type though it is shown as consisting of the pivoted arms 20 connected with the weights 21. The other end of the governor is pivoted to a collar carried by a rotating shaft 23 which is mounted in a sleeve 24, preferably of rectangular shape and mounted to have sliding movement in the standard 16. The shaft 23 is provided with roller bearings 25. A rod 26 is connected with the sleeve 24 and at its other end said rod is connected to a coiled spring 28 which is connected with the piston 29 secured to the end of the rod. In this way the governor is normally held in a retracted position.

A part of the train pipe indicated by the reference numeral 30 is extended up into the casing 1 and its end enters a cylinder 31, communication between the cylinder and pipe being normally closed by a valve 32 connected with a piston 33 by a rod 34. 85 represents a port in the wall of the cylinder. 36 represents an air-chest located on the cylinder 31 and in which operates a sliding valve 37. This valve is provided with a projecting part 38 which comes in the path of an adjustable finger 39 located on the rod 26. A branch pipe 40 leads from the main pipe into the valvechamber of the air-chest and. this pipe is rovided with an extension 41 the end of w ich is opposite a port 42 leading from the valve chamber to the airchest and this part of the air-chest communicates with the cylinder by the port 43. Another part of the air-chest is connected with a whistle 44 by a ipe 45. The valve is provided with suitab e openings so that on the movement of the same the branch 40 is first put in communication with that part of the air-chest which is connected with the Whistle to sound the same and then on the further movement of the valve the extension 41 is put in eonnnunication with the other part of the chest to allow the air to enter the cylinder 3-1to operate the piston 33 to open the valve 352 and thus permit the pressure in the train pipe to escape through the port 35.

An indicating hand 46 is pivoted to a bracket 47 mountedon tlfe air-chest and operates over a suitable dial 48 provided with indicating marks to showtheengineer the rate of speed the train is traveling. At its lower end this handis connected withthe rod 26 as shown.

49 indicates a disk mounted on the pivot 50 carried by the bracket 47 and'this disk is adapted to support a suitable sheet provided with suitable indicatingmarks to represent the miles traveled by the train. A recording device, shown as a pencil carried by the hand 46 cooperates with this sheetto form a record of the variations ofthe speedtraveled by. the train during-the course of the trip. As shown in Fig. 3 the pencil 51 is carried by a cylinder 52 connected with the hand 46 by an extension 53am said pencil being forced into contact'with the sheet on the dial by means of the spring 54 in the cylinder:

The diski is rotated. by," the following means: A shaft 55 mounted in the standards 15 and 16 is connected with the shafting 12 by means of the' gears 56 and this shaft drives a stub shaft 57 by means of a belt 58 passing over the gears 59 and 60. The stub shaft carries a pin-wheelfil, the pins of which engage with perforations 62 arranged in the edge ofthe disk 49.

It will thus he seen" thatas the-governor is operated by the speed oftl're train it will cause the rod 26 to move toward'the right, in Fig, 1; againstthe aetion'of the spring 28 so that at.a predetermined speed. the ad'- jnst'able fihger 39wi'll come in contact with the projection 38 on'the slide valve 37 so {as to move said valve to put the branch 40in communication witlitlre whistle Mend thus sound the alarm, thus giving the engineer warning 'that he is Oin too fast. If lie should negleet't'o 1' rice t e speed the fin-- thel" movement of therod 26? will cause' the slide valve tomove farther so'as to put the branch 40 in communication with the cylinder. This action will cause the piston to slide forwardly to open the valve 32 to perlnit the pressure in the train line to escape through the port 35 and thus apply the brakes. As the rod 26 moves forwardly it will cause the hand 46 to travel over the dial. 48 so that the engineer may see the speed he is traveling at that moment, it being uiulerstood that the casing is provided with a suitablewindow in front of said dial. As the/hand travels over the dial the pencil will also move over the sheet on the disk thus making a permanent record of the speed of the trainthroughout thetrip.-

lt is thought from the foregoing descrip tion that the advantages and novel features ()flll y invention will be readily apparent.

T desire it to be understood that I may make slight changes in the construction and in the combination and arrangement of the several. parts, provided that such changes fall within the scope of the appended claims.

What I claim is: I t 1. A device of the class described compris inga centrifugal governor, means for connecting the same to one of the train wheels, a rodconneeted with the governor; alarm mechanism operated by the rod at one step in the movement thereof, brake applying means operated by said rod in another step of its movement, a dial, an indicating hand operating over the same, said hand being connected with the rod, and recordin g means associated with said hand.

2. A device of the class described comprising a centrifugal governor, means for connecting the same with one of the train wheels, a disk, means for rotatingthe same by the train wheel, a rod adapted to be moved longitudinally by the governor, an indicating liand connected with the rod' and moved thereby; a dial cooperating with said hand, a pencil connected with thehand-and engaging, with the disk an adjustable firrger on the -rod.fa slide valvehaving a projection adapted to engage with said finger; alarm and brake applying mechanisms aetuatedlby said valve, and a spring connected with: said rod for re'turning the parts to normalposition.

Ih testimony whereof I aflix my signature.

Copies of this patenrmay' be obtained ferrite cents each;- by aaaressimg: the 'Gomm1saimer of amine,

Wellington; '20. 0:" i 

